diff options
-rw-r--r-- | libavcodec/sbrdsp.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/libavcodec/sbrdsp.c b/libavcodec/sbrdsp.c index f942759..8c88fb3 100644 --- a/libavcodec/sbrdsp.c +++ b/libavcodec/sbrdsp.c @@ -35,13 +35,18 @@ static void sbr_sum64x5_c(float *z) static float sbr_sum_square_c(float (*x)[2], int n) { - float sum = 0.0f; + float sum0 = 0.0f, sum1 = 0.0f; int i; - for (i = 0; i < n; i++) - sum += x[i][0] * x[i][0] + x[i][1] * x[i][1]; + for (i = 0; i < n; i += 2) + { + sum0 += x[i + 0][0] * x[i + 0][0]; + sum1 += x[i + 0][1] * x[i + 0][1]; + sum0 += x[i + 1][0] * x[i + 1][0]; + sum1 += x[i + 1][1] * x[i + 1][1]; + } - return sum; + return sum0 + sum1; } static void sbr_neg_odd_64_c(float *x) |